property theURL : ""
tell application "Safari"
set theURL to URL of current tab of window 1
end tell
if appIsRunning("Google Chrome") then
tell application "Google Chrome"
if (count of (every window where visible is true)) is greater than 0 then
-- running with a visible window, ready for new tab
else
-- running but no visible window, so create one
make new window
end if
end tell
else
tell application ...